5. Tilt the shuttle assembly down to engage the other pair of pinion gears with their
racks.
6. Reach in through the front of the chassis past the forward bulkhead, and place
your hand under the shuttle assembly to assist in lowering it.
Note
: For proper operation, the assembly should move through the racks in a
constantly level posture.
7. Applying a slow uniform pressure, gently push the shuttle assembly downward
for about ½ inch (1.27 cm).
As the assembly lowers, the pinion gears turn in their vertical racks and the
shuttle gear train is gently driven.
8. Check the uniform position of the four pinion gears relative to the top of their
racks. (If it’s not level front to rear, back the assembly out and start again.)
9. Check horizontal alignment of the shuttle assembly flange relative to the upper
part of the bulkhead. (If it’s not level, back the assembly out and start again.)
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